Jack



June 29; 1937. I

B. R. M CONNELL JACK 2 Sheets-Sheet l Filed March 8, 1935 INVENTORBJRJYZC ConizeZZ K ATTORNEY? June 29, 1937 B. R. MOCONNELL JAcx FiledMarch a, 1955 2 Sheets-Sheet 2 OZ E TZ N Ne R wn Km W C W @Y ma R B MPatented June 29, 1937 PATENT OFFICE JACK Benjamin B McConnell, Waco,Tex, assignor to Herbert Clyde McConnell, Port Arthur, Tex.

Application March 8, 1935, Serial No. 10,114

3 Claims. (01. 254-30) This invention relates to jacks and particularlyto an improved hydraulic jack which may be used for many purposes butparticularly for removing drills, pipes, and the like, which may becomestuck.

Another object is to provide an improved hydraulic jack for a rockdrill, pipe, or other object, wherein the pulling action is from the'center of the jack and also wherein the drill, pipe,

or the like, or an extension thereof, extends through the jack.

An additional object is to provide an improved construction of jack forpulling drills, pipes, and the like, wherein after the jack has beenactuated for a short distance it may be released from the drill and thedrill held in its elevated position and the jack moved to its formerposition for a second operation so as to give successive pulls on adrill, pipe', or the like, without allowing the drill or pipe anyretrograde movement.

In the accompanying drawings- Figure l is a view partly in elevation andpart1 in section showing a jack and attachment therefor disclosing anembodiment of the invention;

Fig. 2 is a vertical sectional view through the upper part of Fig. 1,and illustrating the construction oi. the jack and how the hydraulicaction' takes. place;

Fig. 3 is a sectional view through Fig; 2 on the line 3-3;

Fig. 4 is a side view of the jack illustrated in Figs. 1 and 2,positioned to engage and pull a drill, the supportingtubular member andasso- 85 ciated parts illustrated in Figs.- 1 and 2 being eliminated; T

Fig. 5 is a top plan view with certa n Parts in section illustrating theclamp shown in Fig. 4.

Referring 'to the accompanying drawings by numerals, I indicates a drillof the usual kind, the same being hexagonal in cross section and havingthe usual cutting teeth 2 at the end. When drilling in the customaryway, usually an air rivet gun is used to strike the drill in order notto cause the lower end of the drill to chip away the stone. During thisoperation the drill v bounces .around in the hole. It will be understoodthat the drill shank has a hole from one end to the other and after thedriller has hammered the drill for a while he stops the hammeringoperation and blows air from the gun to the bottom of the hole throughthe drill so as to blow outthe dust and small chips of stone. After thisblowing-out operation the driller continues the hammering operation.When the drill strikes a damp place in the stone the dust 'and chips ofstone will be moist and will not blow out of the hole but will blowpartly upwardly through the hole and then run back downwardly, and airblowing will cause this mixture to coag-' 5 ulate or cement together andchoke the hole so that the foot 01' the drill which is more or lesslarger than the stem cannot be pulled out of the hole by reason of thiscemented or coagulated ground stone and water. When this oc- 10 curssome kind of pulling apparatus must be applied in order to remove thedrill.

In the present invention an improved jack has been provided which willremove the drill I, or. a pipe from a well, or other article. As shown15 in Fig. l, 3 indicates the jack, which is provided preferably with anannular groove 4 (Fig.3) and in this groove the upper end of a tube,S'is fitted, the lower end being held or otherwise secured to astiffening and engaging ring 6 which 20 forms .a base adapted to rest onthe surface I. This arrangement is used where a part of the drill Iextends only a short distance beyond the surface]. Where the drillextends an appreciable distance beyond the surface "I, the ar- 25rangement shown in Fig. 4 is used, namely, the

jack 3 is positioned to rest on the surface I and the upperpart of thedrill extends through the jack. As shown in Fig. 3 there is provided arod 8, which acts as an extension of the drill 30 I, said rod beingenlarged at 9 and formed with a chamber II) for receiving the upper endof the drill l. A supporting ring II is mounted on the enlargement 9 andis engaged and supported by an annular flange I2. If desired, the ringII 5 could be brazed, welded, or otherwise secured to the enlargement 9.A clamp I3 shown in detail in Fig. 5 and more f hereinafter described iscaused to clamp the pper end portion of drill l and is connected to thering II by suit- 40 able bolts I4 and I5. The upper-part of the rod 8 isprovided with threads I 6 for receiving the wing nut II, whereby the rodmay be brought under tension and the various parts caused toassume thepositions'shown in Fig. 2. It might 5 be possible to pull the drill I bymerely rotating the nut H, but this is a slow process and ordinarily isnot carried out. However, the base of nut l'l rests upon a'plunger I 8forming part of jack 3. This plunger slides back and forth 50 within acasing I9, which casing is preferably provided with an annular chamber20 for the reception of oil or other liquid used in the jack.

A number of relief passageways 2| extend from surface of the casing is.This inner surface The casing i9 is preferably integral with a base 23,but at the upper end a removable top or cover 24 is provided and held inplace by any desired number of screws 25. An annular packing 26 isprovided in the cover 24, said packing being waste or other desiredmaterial, which prevents dirt or dust from entering between the plungerand the casing l9. Arranged centrally'within the bore 22 is a tubularmember 21, rigidly secured to the base 23 by riveting, welding, or thelike. The exterior surface of this tubular member fits the bore 28 ofthe plunger i8, which plunger has a closed upper end except for thecentral opening 29 through which the rod 8 extends, or the drill lextends if the same is sufiiciently long. A packing 38 is carried by theupper end of the tubular member 21 and is held in place by a suitablering 39, so as to prevent dust from entering the space between theplungward and from the base 23 when the device is in operation. Theplunger 58 at the lower end really acts as a piston and is provided withan annular washer 33 held in place by an annular ring 32. The ring. 32is clamped in'place by any desired number of screws 34. 5

When the parts are in the position shown in Fig. 2, the jack is in itsconstricted or retracted position. 4 Oil or other liquid is forced intothe chamber 35 through a passageway 36 and acts on the washer 32 andassociated parts as well as on the .base 23, whereupon the plunger Iwill begin to move upwardly or rather away from the base 23. As shown inFig. 2, a small passageway or vent 31 isarranged intermediate the heightof the casing l9 so that when the washer 32 reaches this point the oil'or other liquid will move backinto the chamber 26 in case the pump 38continues to function. observed that the pump 38 comprises a cylinder 39and a piston 40- which may be operated by any desired means. saidcylinder being screwed .into an enlargement 4| forming preferably anintegral extension of easing Hi. It will also be noted from Fig. 2 thatthere is provided a passageway 42 leading to a small chamber 43 and asecond passageway 44 leading from chamber 43 to passageway 36. A plug 45is arranged at the outer end of passageway 36 so as to normally closethis passageway at this point. Springpressed ball valves 46 and 41normally close the passageways 42 and 44, said valves operating inopposite directions. When the piston 40 is moved upwardly, the valve 41will remain seated but liquid will flow from the chamber 20 into chamber43 and into the cylinder 39- Upon the return or downward stroke of thepiston 40, the. oil will cause the valve 46 to quickly close and remainclosed. At the same time, the oil will pass to valve 41 and open thesame, after which it will flow through the passageway into chamber 35for raising the plunger 18 and anything connected therewith.

When the parts are rigged up as shown in Fig. 1 and the plunger I8 ismoved upwardly, it, will press against the nut I l and will pullupwardly on rod 8, which in turn will pull upwardly on the drill I formoving the same out 01 the .From Fig.2it willbe' drilled hole. It thedrill 8 projects sufiiciently far out of the drilled hole to extendthrough the jack, as shown in Fig. 4, the nut ll, rod 8 and associatedparts will not be necessary, though the clamp l3 will be necessary. Asshown in Fig. 5, the clamp I3 is provided with blocks t8 and 49 havingnotches resulting in comparatively round holes 50 and 5! foraccommodating the bolts I 4 and i5. Bolts 52 and 53 act to pull theblocks 48 and 49 toward each other and thereby v to clamp them againstthe drill i. To augment this clamping action there is provided a pair ofset screws 54 positioned to press against one of the corners of thedrill. When it is screwed down tightly, the set screws are not utilized,but if it is found that'the drill is sliding through the 'clamp,theseset screws are tightened up as much as possible so as to add to theclamping action.

After the plunger i8 has been moved upwardly to its fullest extent andit is desired to return the same to its lower position, as shown in Fig.2, the valve 63 (Fig. 2) is opened and the liquid in chamber 35 willpass through the passageway 66 back into the chamber 20 so that it maybe used again.

I claim:

1. A hydraulic jack, comprising a body formed with a base and having acentrally positioned passageway extending entirely therethrough,

said body being also formed with three concentrically' positionedtubular members upstanding from said base, the two outer tubular membersbeing connected together at both ends to form a. liquid reservoir, theinner of said tubular members with part of said base and the centrallypositioned tubular member forming an annular chamber open at one end, aplunger annular in cross section fitted to slide in said chamber, saidplunger being open at both ends, a pump carried by said base, said basebeing provided with an outlet from said reservoir to the pump and aninlet to said chamberextending from the pump, the inner of said tubularmembers being provided with a vent passageway extending from the lowerend of said chamber into said reservoir, and a manually actuated ventvalve for controlling the flow of liquid through said vent passageway.

2. A hydraulic jack, comprising a body having a'substantially flat baseprovided with a pair of concentrically positioned tubular upstandingmembers connected together at the top for forming an annular reservoir,said base being also an integral enlargement adjacent the outerupstanding member, a plurality of check valves arranged in saidenlargement, said base having a passageway extending from said checkvalves into said reservoir and a central passageway ex tending to aposition interiorly of the inner of said upstanding tubular members, apump carried by said enlargement functioning to draw liquid from one ofsaid passageways and to discharge the same through the other passageway,an inner tubular member having one end fitting into the central aperturein said base, said inner tubular member extending. to a position nearthe upper ends of said upstanding tubular members, an annular plungerfitting around said inner tubular member, and means for venting thespace normally occupied by said plunger so that fluid may fiow into saidreservoir, said means including a manually controlled valve, the innerupstanding member beingv providedwith a passageway intermediate itsheight presenting .a

vent between the chamber occupied by said plunger and said reservoirwhereby when said a pump has forced liquid into said chamber until theplunger has risen to a point above the lastmentioned vent, the liquidwill flow back into the reservoir and will not act to further raise theplunger.

3. A hydraulic jack comprising a casing'having a base provided with acentrally positioned aperture and three spaced upstanding tubularmembers, the two outer tubular members bein connected together at thetopand bottom to form an annular liquid reservoir while the centertubular member and the inner member or said two outer tubular membersform with said base an annular chamber open at one end, said centertubular member being open at both ends and registering with the aperturein said base, a plunger annular in cross section positioned toreciprocate in said annular chamber, means for removing liquid from saidannular reservoir and forcing the same into said chamber for causing theplunger to move away from said base and means for venting said chamberinto said an"- nular reservoir, said opening in said base and saidcenter tubular member permitting an article acted on by saidplunger -toextend entirely through the center of the jack.

BENJAMIN R. MCCONNELL.

